SH7059 Datasheet, PDF (492/1042 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

16. Synchronous Serial Communication Unit (SSU)
Bit Bit Name
1 CSS1
0 CSS0
Initial Value R/W
0
R/W
0
R/W
Description
SCS Pin Selection
Select that the SCS pin functions as a port or SCS input or output.
However, when MSS = 0, the SCS pin functions as an input pin
regardless of the CSS1 and CSS0 settings.
00: Reserved. (Initial value)
01: Functions as SCS input
10: Functions as SCS automatic input/output (however, functions as
SCS input before and after communication and outputs a low level
during communication)
11: Functions as SCS automatic output (however, outputs a high level
before and after communication and outputs a low level during
communication)
SSCRH is initialized by a power-on reset, hardware standby mode, and software standby mode. It is not initialized by a
manual reset.
16.3.2 SS Control Register L (SSCRL)
SSCRL selects software reset and transmit/receive data width.
Bit:
7
6
5
4
3
2
1
0
—
—
SRES
—
—
—
DATS1
DATS
Initial value:
0
0
0
0
0
0
0
0
R/W: R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit Bit Name
7, 6 ⎯
5 SRES
4 to ⎯
2
1
DATS1
0
DATS0
Initial Value R/W
All 0
⎯
0
R/W
All 0
⎯
0
R/W
0
R/W
Description
Reserved
These bits are always read as 0. The write value should always be 0.
Software Reset
Setting this bit to 1 forcibly resets the SSU internal sequencer. After that,
this bit is automatically cleared. The ORER, TEND, TDRE, RDRF, and CE
bits in SSSR and the TE and RE bits in SSER are also initialized. Values
of other bits for SSU registers are held.
To stop communication, set this bit to 1 to reset the SSU internal
sequencer.
Reserved
These bits are always read as 0 and cannot be modified.
Transmit/Receive Data Length Selection
Select serial data length from 8, 16, and 32 bits.
00: 8 bits (Initial value)
01: 16 bits
10: 32 bits
11: Setting invalid
SSCRL is initialized by a power-on reset, hardware standby mode and software standby mode. It is not initialized by a
manual reset.
Rev.3.00 Mar. 12, 2008 Page 402 of 948
REJ09B0177-0300